CN1486899A - foldable baby carriage - Google Patents

Abstract

The invention discloses a three-wheel foldable child car, which is provided with a foldable framework device, wherein the framework device comprises a rear wheel shaft with a larger diameter, a connecting body at two ends of the rear wheel shaft is connected with a group of rear wheels with pneumatic tires, and the rear wheel shaft device is fixedly connected with a group of upright supports and a supporting device. A bottom support means comprises a set of substantially parallel bottom support tubes, one end of which supports the front wheels and the other end of which is flexibly connected to the rear wheel axle, so that the upright support can be moved above the bottom support means and parallel to each other when folded. The handle device comprises a U-shaped handle and a handle bracket, and the U-shaped handle is flexibly connected to the contact device. The connecting device is also assembled with the upright bracket and the central bracket. The other end of the central bracket is connected with the front end of the bottom supporting device. The connection device and the corresponding central support are provided with fixing and releasing devices so as to fixedly lock the connection device and the central support to maintain the upright state of the baby carriage, or release the connection device to enable the connection device to slide along the central support to control the baby carriage to be in a folding and contracting state.

Description

foldable stroller

technical field

The invention relates to a children's carriage, especially a foldable children's carriage with three wheels which is suitable for running and easy to fold for storage and transportation.

Background technique

Generally speaking, most baby carriages have gradually developed into three-wheeled vehicles, which can be used during running, especially for users who are jogging and pushing the baby carriage at the same time. A typical three-wheeled stroller is made of an aluminum tube as a skeleton device to provide both support strength and lightness, and is assembled with one or two seats made of similar materials such as cloth, and pneumatic tires. The two rear wheels have about the same radius as a bicycle wheel suitable for elementary school children, while the front wheels are slightly smaller. These strollers have been designed to be foldable, detachable, or both for storage and transport.

Various baby carriages have developed different folding mechanisms, which generally include a device that locks the baby carriage in an upright use state, and a device that releases the lock to collapse for storage and transportation. Folding mechanisms such as these have been disclosed in US5,536,033 patents issued to Paul Hinkston on July 16, 1996, US5,887,889 patents issued to Michael Andrus on March 30, 1999, and Red Lan's patents issued on October 16, 2001 US6,302,613 patent, and US6,267,405B1 patent authorized to Chin-Chiao Chen on July 31, 2001. These designs all show that the folding mechanism of the stroller has been continuously improved to make it easier to shrink for storage and transportation.

However, generally speaking, the existing technology still cannot optimize the folding mechanism, such as features such as simple design and easy use are not enough. The folding mechanism currently required should meet the requirements of high safety, high reliability, and easy use in various situations.

Contents of the invention

The main purpose of the present invention is to provide a foldable baby carriage, which can achieve better folding characteristics through an improved folding mechanism, is easier to operate, and is more adaptable to various situations to achieve various folding states.

Another object of the present invention is to provide a foldable three-wheeled stroller, which can also be used when running between running through the easier-to-operate frame device, which improves the value of use and is more convenient for storage and transportation.

Another object of the present invention is to provide a collapsible three-wheeled children's vehicle, with detachable wheels and a foldable or collapsible frame, so that it is easy to assemble and disassemble. This children's vehicle is light and stable. and light weight advantages.

Another object of the present invention is to provide a foldable three-wheeled stroller for children, which is provided with a foldable frame, so that it is easy to fold and disassemble.

Another object of the present invention is to provide a foldable three-wheel baby carriage, the folding mechanism of which is simple in design and easy to operate.

In order to achieve the above-mentioned purpose, the foldable stroller with three wheels has a foldable or collapsible skeleton device, which can convert the stroller from an upright use state by extending and folding its length and height into a folded state. The collapsible frame device includes a base, ie, a lower structure device, and an upper structure device.

The base unit includes a rear wheel axle with a larger diameter, and connecting members are provided at both ends to support the larger radius detachable rear wheel with a pneumatic tire. The rear axle is connected to a bottom support device and an upright support. The bottom support device includes a group of substantially parallel bottom support tubes, one end of which supports the front wheel, and the other end is flexibly connected to the rear wheel shaft by a crank or hook, so the upright support will fold down to the bottom support when it is folded. on the tube and parallel to each other.

The upper structure device includes an integral handle assembly, which includes a U-shaped handle portion and an extended handle bracket, which is parallel to the two ends of the U-shaped handle. The U-shaped handlebar portion has a brake lever for caliper braking, which requires the use of the front wheel rim. A handle component is connected to both ends of the U-shaped handle like a hinge, so that the U-shaped handle can be folded down to the parallel position of the handle bracket, and the other end of the handle bracket is flexibly assembled with a contact device, The linkage device is then assembled at the end of the upright support not connected with the rear wheel. The parallel handle is flexible so that one end thereof is assembled with a contact device, and the other end is connected with the footrest. The linking device is provided with a release device to control the children's carriage to be locked in an upright state or to release the relevant bracket, and the bracket is folded by sliding the bracket. In addition, there are additional brackets, one end of which is flexibly connected to the front end of the bottom support unit, and the other end is firmly connected to the footrest.

Other objectives, features and advantages of the present invention can be deeply understood through the following descriptions of specific embodiments in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

Fig. 2 is the left side view of the embodiment of the present invention;

Fig. 3 is a left side view of the embodiment of the present invention when the handle is folded inward during the folding process;

Fig. 4 is a left side view of the contact device moving along the skeleton during the folding process of the embodiment of the present invention;

Fig. 5 is a left side view of an embodiment of the present invention in a completely folded state;

Fig. 6 is a schematic diagram of the combination of the contact device and the release device according to the embodiment of the present invention;

Figure 7 is a sectional view of the contact device shown in Figure 6;

Fig. 8 is a side view of the connection device shown in Fig. 6 locked in an upright state;

Fig. 9 is a side view of the linking device shown in Fig. 6 in the release process shown in Fig. 4;

Figure 10 is a side view of the linking device shown in Figure 6 in the process of release shown in Figure 5;

Figure 11 is a front view of an embodiment of the present invention;

Figure 12 is a rear view of an embodiment of the present invention;

Figure 13 is a top view of an embodiment of the present invention;

Figure 14 is a bottom view of an embodiment of the present invention.

Explanation of reference signs:

10. Skeleton device; 20. Lower structure device 21. Bottom support device;

21a, bottom support tube; 21b, bottom support tube; 22, rear axle;

23. Brake lever; 24. Upright bracket; 26. Upright bracket;

27. Brake device 27a, brake lever 27b, brake line;

27c. Brake calipers 28. Rear tires; 29. Front wheels;

30. Upper structure device; 32. U-shaped handle; 32a. Hand grip body;

33. Handle bracket; 34. Handle bracket; 35. Connecting device;

36. Coupling device 37. Central support; 38. Central support;

40. Footrest; 40a auxiliary bracket 40b, auxiliary bracket;

52a, connecting body; 52b, connecting body; 54, contact device;

56. Contact device; 56a, main block; 56b, hook body;

57. Holes; 61. Bolts; 62. Nuts;

63. Bolt; 64. Nut; 70. Fixing device;

71, sleeve; 71a, cylinder cap; 72, lock hole;

73, lock button; 73a, shrapnel; 80, release button;

81. Support body; 83. Bolt; 84. Nut;

85. Contact keyhole.

Detailed ways

Please refer to FIG. 1 , the present invention is a foldable stroller for children, including three wheels; a foldable skeleton device, which can be converted from an upright use state to a folded state by stretching its length and height.

The foldable frame device 10 includes a lower structure device 20 and an upper structure device 30 . The lower structure device 20 includes a rear wheel shaft 22, which is a tubular device with an enlarged diameter, and a group of identical detachable pneumatic tires are connected at its two ends. The lower structure device also includes a group of upright supports 24, 26, and A bottom supporting device 21 connected vertically. As will be further explained below, the upright supports 24, 26 are vertically engaged with the connecting devices 54, 56 respectively.

This bottom support device 21 comprises a group of bottom support tubes 21a, 21b that are substantially parallel to each other. One end of each bottom support tube 21a, 21b is connected to the front wheel 29 to support it, and the other end is connected to the rear wheel by coupling bodies 52a, 52b respectively. The axles 22 are connected, and the connecting bodies 52a, 52b can be any structure that facilitates the folding of the upright supports 24, 26 in the horizontal direction, as shown in FIG. 5 . The vertical connecting bodies 52a, 52b are arranged to offset a certain distance from the center of the rear axle 22, so that when folding, the upright brackets 24, 26 fold down toward the bottom supporting device to reach a nearly parallel position. In this embodiment, the connecting body 52a, 52b is a ring structure, which is connected to the auxiliary bracket 40a, and one end is vertically connected to the supporting components 42a, 42b.

The upper structure device 30 includes a handle device, which includes a substantially planar U-shaped handle 32 and handle brackets 33, 34, and two connecting devices 35, 36 that connect the two ends of the U-shaped handle 32 respectively. end. With the connecting means 35 , 36 , the U-shaped handle 32 can be folded down to a position quite parallel to the handle brackets 33 , 34 as shown in FIG. 3 . The other ends of the handle brackets 33, 34 are connected to the connecting devices 54, 56 respectively. The U-shaped handle 32 is provided with a brake device 27, and the brake lever 27a for manipulating the brake device 27 is combined with the rim of the front wheel 29, and suitable handle material (not shown) can be set. The distance between the two ends of the U-shaped handle 32 is wider than the distance between the two connecting devices 54 , 56 , so that the handle brackets 33 , 34 have the same inward curvature to connect with the connecting devices 54 , 56 .

Please refer to FIG. 2 , the U-shaped handle 32 is adjusted to be in an almost horizontal state from the plane handle brackets 33 , 34 via connecting devices 35 , 36 , and the U-shaped handle 32 is provided with an upwardly facing handle 32 a , And by its central position and braking device 27 assembly. In use, the nearly parallel U-shaped handlebar 32 and the upward-facing grip 32a are convenient for the user to transmit the thrust to the front wheel 29 easily.

One end of the two parallel central supports 37, 38 is flexibly assembled with the connecting device 54, 56 respectively,

The other end is connected to the footrest 40 . As shown in FIG. 6 , the connecting devices 54 , 56 are respectively provided with a fixing and releasing device 70 at the rear ends of the central brackets 37 , 38 assembled therewith. In use, the fixing and releasing devices can fix the upper structure device in an upright position or release the linkage devices to slide down each bracket to achieve the state of folding the upper structure device on the lower structure device, As shown in Figure 5.

Each of the auxiliary brackets 40 a, 40 b has a first end fixedly connected to the footrest 40 , and the other end connected inwardly to the bottom support tubes 21 a, 21 b to assist in supporting the front wheel 29 . The front wheel 29 can be installed in any detachable and convenient manner like bicycle wheels.

The footrest 40 is made of plastic material and is roughly in the shape of a trapezoidal disk. to facilitate driving on stagnant water or wet roads. The back side of the footrest 40 is firmly assembled with the central brackets 37 and 38 by methods such as welding or rivets to ensure the stability of the front end.

Please refer to Figures 6-10, especially Figures 6 and 7, which show that the folding device of the present invention includes connecting devices 54, 56 and their associated fixing and releasing devices 70, central supports 37, 38, and the like. Taking the connecting device 56 in FIG. 5 as an example, the connecting device 56 includes a saddle-shaped main block 56 a and a corresponding hook 56 b. The setting of the main block 56a is mainly used to assemble with the handle bracket 34 (as shown in the dotted line in FIG. 6 ), and the handle bracket is securely locked by two sets of bolts 63 and nuts 64 at the front and rear. The connecting device 56 also includes a hole 57 for allowing the central support 38 to pass through and slide therein.

The hook body 56b is mainly used as a hinge for vertically receiving the upright bracket 26 (as shown by the dotted line in the figure). The end of the upright bracket 26 is connected with a strip-shaped protrusion (not shown) whose thickness is the radius of the upright bracket 26 and whose distance is smaller than the distance from the side of the hook body 56b. The protrusion has a slit like aperture 60 with a suitable fastener, such as a bolt 61 and a nut 62, so that the end of the upright support 26 can be pivotally connected to the hook body 56b.

The execution of the folding mechanism requires the participation of the fixing and releasing device 70 and the release button 80 to release the central support 38 so that the upper structure device 30 and other components can be retracted and folded. The fixing and releasing device 70 includes a sleeve 71 capable of matching with the central support 38 , a locking button 73 and an elastic piece 73 a placed in the tube of the central support 38 . Except for the cap 71 a , the diameter of the sleeve 71 is smaller than the diameter of the hole 57 , so it can be clamped on the cap 71 a backward so that the sleeve 71 can freely enter and exit the hole 57 . The lock button 73 is arranged on a V-shaped elastic piece 73a, which is cut according to standard specifications and placed in an appropriate position to maintain an elastic force in the tube of the central bracket 38, whereby the elastic force enables the lock button 73 to be positioned on the sleeve. The keyhole 72 on the 71 passes out of it. When the stroller is in use, that is, in an unfolded state, the sleeve 71 is fully extended into the hole 57, and is fixed in the connection lock hole 85 by the lock button 73.

The release button 80 is firmly and flexibly installed in the support body 81 , and the support body 81 is installed outside the connection locking hole 85 of the connection device 56 by means of bolts 83 and nuts 84 . The release button 80 has a protrusion and can move in and out of the connection lock hole 85 , and releases the lock button 73 in the support body 81 so that the sleeve 71 can be released from the connection device 56 . Further, the connecting device 56 slides down along the central support 38 to reach the folded state as shown in FIG. 5 .

In this way, in the unfolded state, the connecting device 56 slides upwards along the central bracket 38 until the sleeve 71 stretches into the connecting lock hole 85, and the locking button 73 is firmly stuck in the connecting lock hole 85 by the elastic force of the elastic piece 73a In order to fix it. To switch to the folded state, the user depresses the release button 80 to push the lock button 73 away from the linkage lock 85, so that the linkage device 56 slides downward to reach the folded position.

FIG. 2 and FIG. 8 show the relative positions of the upright support 26 and the linking device 56 of the stroller in an unfolded state. 3 to 5 illustrate progressive changes of the skeletal device 10 during the folding process. As shown in FIG. 3 , the U-shaped handle 32 is rotated clockwise to the bottom of the handle brackets 33 , 34 . As shown in Figure 4, when the release button 80 is pushed down, the connecting devices 35, 36 can move downward along the central brackets 37, 38, and at the same time, the upright brackets 24, 26 rotate counterclockwise with the connecting devices 54, 56 as the fulcrum. Lower down onto bottom support brackets 42a, 42b. As shown in FIG. 9 , the upright support 26 is rotatable within the linkage 56 . As shown in Fig. 5, the connecting devices 35, 36 move along the central brackets 37, 38 toward the footrest 40, while the upright brackets 24, 26 rotate down to touch the bottom support tubes 21a, 21b, so that the overall frame is compressed and folded . As shown in FIG. 10 , the upright support 26 is rotated in the connecting device 56 until the baby carriage is completely folded.

The upright bracket 26 is received inside the hook body 56b, and is fastened on the hook body 56b by bolts 61 and nuts 62, so that the upright bracket 26 can be folded with the change of its rotation angle, as shown in FIG. 8 Figure 10 shows.

The saddle of this main block 56a is provided with a groove, and its depth and length all just accommodate one end of the handle bracket 34, because the handle bracket 34 and the contact device 56 are completely matched, when the baby carriage is used, it is as if the two are integrated. To avoid shaking and the accompanying rattling sound.

The U-shaped handle 32 is roughly U-shaped, and its ends are connected with connecting devices 35, 36, and its curved portion is provided with a hand grip body 32a, which is mainly composed of a material that is convenient for the user to hold the handle, and is coated on The upward bend of the U-shaped handle 32. The lockable brake lever 27a is installed in the center of the handle body 32a, through the brake line 27b, the brake caliper 27c can be controlled to generate friction on the front wheel 29 to achieve the purpose of braking. When the stroller is in use, the U-shaped handle 32 is approximately horizontal and bent upwards to form a handle 32a, the center of which is the brake device 27, so that the user can easily and comfortably transmit the thrust to the axle of the front wheel 29 .

Please refer to FIG. 11 to FIG. 14 , which show some components and features of the present invention more clearly. As shown in FIGS. 11 and 12 , the rear pneumatic tire 28 is slightly inclined to improve the stability during travel, and is suitable for various road surfaces. These figures show more clearly the relative positions of the footrest 40 , the auxiliary brackets 40 a , 40 b , the U-shaped handle 32 , the connecting means 35 , 36 and the handle brackets 33 , 34 .

The frame device 10 is made of aluminum tubes, and all of them have the same caliber except for the rear axle 22, in order to save cost for assembly. In addition, except for the U-shaped handle 32 and the handle brackets 33 and 34, the other aluminum tubes are all linear. The connection devices 54, 56 are made of injection plastic, and the gaps in the tubes can just allow the aluminum tubes to pass through, so that they have both stability and rotation flexibility. The baby carriage can keep running stably and can be folded efficiently when in use. The space distance in the tube is roughly equal to the diameter of each tube part to ensure stability. Whether the user is walking, jogging or running, the stroller is stable and efficient in use.

The above is a preferred embodiment shown and described, but there may be other variations or modifications without departing from the spirit and scope of the present invention. In addition, although the above-mentioned embodiments are described by words such as upper, lower, left, right, etc., these words are used in conjunction with the illustrations to indicate their relative positions, and are not used to limit their directions.

Claims (12)

1. A foldable stroller for walking and running, comprising: a rear axle device; tricycle; A set of upright brackets, one end of which is fixedly connected to the rear axle device; A set of bottom support devices, one end of which is flexibly connected to the near center of the rear axle so that the bottom support devices are roughly parallel to each other; a plurality of attachment means, located at the other end of the bottom support means, to connect it to the wheel; and An upper structural device, including a U-shaped handle for easy holding by the user; a set of handle brackets; a set of connecting devices, so that the end of the U-shaped handle is flexibly connected to one end of the handle bracket; a set of central brackets , one end of which is flexibly connected to a plurality of connection devices on the bottom support device; and a set of substantially identical connection devices, each connection device comprising: (a) a means for securely accommodating the end of the handlebar bracket that is not connected to the engagement means; (b) a device for flexible assembly to the end of the upright frame that is not fixed to the rear axle; (c) a means for receiving the end of the central frame not connected to the connecting means and allowing the connecting means to slide freely along the central frame, thereby sliding the upper structure means down on the lower supporting means to form a baby carriage fold; 2. The foldable baby carriage as claimed in claim 1, wherein the end of the central bracket not connected with the connection device is provided with a fixing and releasing device, the fixing and releasing device can keep the baby carriage upright in the locked state, and when released The state then makes the linking device slide along the central support so that the stroller can be folded and retracted. 3. The foldable baby carriage as claimed in claim 1, wherein the connecting device is provided with a release button to control the fixing and releasing device to release one of the central supports. 4. The foldable baby carriage as claimed in claim 1, wherein the connecting device is provided with a saddle-shaped main block, and the depth of the main block is deeper than the end of the handle bracket connected thereto. 5. The foldable baby carriage as claimed in claim 1, wherein the connection device is provided with a hook, and the hook is flexibly assembled with one end of the upright support. 6. The foldable baby carriage as claimed in claim 1, wherein the connecting device is provided with a hole, and the hole accommodates the central frame to slide therein. 7. A collapsible baby carriage, including: tricycle; a rear axle, the connectors at both ends of which connect two of the wheels; An upper structure device, including a U-shaped handle part, which is convenient for the user to hold; a set of handle brackets, which extend downward from the handle part to the front end; A set of bottom support frames is divided into a front end and a rear end. The front end is assembled with the third wheel of the wheel, and the rear end is flexibly connected to the near center of the rear wheel axle, so as to form a roughly horizontal relationship between the support frames. its outer edge is approximately at right angles; A set of upright brackets, the bottom end of which is fixed to the outside of the connection between the bottom support frame and the rear wheel shaft, the bottom end of which is parallel to the bottom support frame in the folded state, and the upright bracket is still positioned on the bottom support frame outside. 8. A foldable stroller, the frame device of which includes: a rear axle; A set of bottom support frames, the rear end of which is connected to the center of the rear wheel axle and the front end is connected to the front wheel to support it; A set of upright brackets, one end of which is fixed on the rear axle; a handle device, the inclined part of which is connected to the other end of the upright support, The handle set contains: A U-shaped handle, which is roughly U-shaped, is convenient for the user to hold; A set of handle brackets respectively connected to the two ends of the U-shaped handle; a set of central brackets connected at one end to the front end of the bottom bracket; and A set of connecting means, the size of assembly is just enough to firmly receive the other end of the set of handle brackets, and just enough to flexibly accommodate the upper end of the upright bracket, and just enough to slide along the central bracket to make the handle assembly fold and Drop onto the bottom support frame. 9. The foldable baby carriage as claimed in claim 1, wherein the upright support, the bottom support device, the U-shaped handle, and the handle support are all made of tubular objects with the same diameter. 10. The foldable baby carriage as claimed in claim 1, wherein the upright frame and the bottom support device are several straight tubes arranged roughly in parallel, and their outer edges are roughly at right angles. 11. A collapsible stroller, the contact device of which includes: a main block and a corresponding hook; the main block has a saddle to securely receive one end of a tubular stent; the hook pivotally receives an end of another tubular support; and A hole is installed on the main block to accommodate another tubular support in a sliding manner. 12. The connecting device of the foldable stroller as claimed in claim 11, wherein the central support includes a fixing and releasing device, so that the tubular central support is fixedly locked with the main block, and the main block is further provided with a Release the button to release the lock.

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